Finally, unpublished data from a large clinical trial (ClinicalTrial.gov NCT03809429, EudraCT number: 2017-002783-40) on 437 infertile patients without elevated markers of ovarian reserve showed no significant difference in efficacy and safety of follitropin delta for ovarian stimulation in IVF/ICSI cycles down-regulated with long GnRH agonist protocol when compared to short GnRH antagonist protocol (Table 3). Here, GNRH1 is linked to Infertility.